second hand

名词 second hand:

1. an intermediate person; used in the phrase `at second hand'
2. hand marking seconds on a timepiece

形容词 second hand:

1. derived from what is primary or original; not firsthand
   同义词：secondhand
2. previously used or owned by another
   同义词：secondhand, used

副词 second hand:

1. from a source of previously owned goods
2. by indirect means
   同义词：secondhand

1. I only heard the news at second hand.
   我只是间接听到这个消息的。
2. Most of our knowledge is at second hand.
   我们的大部分知识是间接的。
3. He sold a bundle of old magazines to the second hand bookstore.
   他把一捆就杂志卖给了旧书店。
4. He bought a second hand bike good for80 yuan.
   他买了一辆值80元的二手自行车。